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March 31, 2015

March 31, 2015

Posted by **Andrea** on Friday, March 15, 2013 at 10:59am.

Average SD Number of Students

Section 1 68 9 20

Section 2 75 9 25

Section 3 60 9 32

Find the average score of all the students in the class.

- Statistics -
**PsyDAG**, Friday, March 15, 2013 at 11:12amMean = ∑x/n --> n(mean) = ∑x

(68*20) + (75*25) + (60*32) = ?

Divide that by 20 + 25 + 32 = ?

- Statistics -
**Andrea**, Friday, March 15, 2013 at 11:48amThanks I got it

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